Clean and oil up your firearms, then drive around looking for houses with automobiles in the driveway advertising support for Democrats and primitives. I'm pretty sure they'll have well-stocked refrigerators (a la Nancy Pelosi), and so one won't have to buy groceries at all.
Morally, it's okay to take the groceries of a primitive or Democrat, because you yourself paid for them anyway, from your taxes used for buying them food stamps.